Reason is just an amazing program, I couldn´t believe what I discouvered. A while ago I bought a sencondhand computer with Reason on it (reason 4). First I discovered the Demo, then some songs of the previous owner of the PC.
I started to try to understand what this program was all about, and the more I discovered the more amazed i was!
Now, percusion. To hear how I made it sound using the Thor Beatfilter on Dr. Rex, you can find me on You Tube, where I have a channel under the name AllWithinReason. Look there for the song Percussion Vamp. Under it you wil find the discription:
It says:

I use the trick to feed Dr. Rex with the beatfilter of thor. It is a lot to program but it prevents obvious loops and repeats! This way every note and it´s setting is personal created and unique, this makes it sound like real percussion and drums! A tip for reasonlovers. If you want to add a lively sound to percussional instruments, try the advancedreverb and set it, for example, to ´tiled room´. You wil be amazed how this can influence the soundcolour of your percussionset! The ´life Audience´ is set up by some samples I retrieved from a site containing free sound effects! Have Fun and enjoy listening!